The size of the iso-electronic species and is affected by :
azimuthal quantum number of valence shell
nuclear charge
electron-electron interaction in the outer orbitals
Principal quantum number of valence shell
For isoelectronic species the size is compared by Nuclear charge.
azimuthal quantum number of valence shell
Option 2)nuclear charge
Option 3)electron-electron interaction in the outer orbitals
Option 4)Principal quantum number of valence shell
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